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All results from a given calculation for CH3OCHO (methyl formate)

using model chemistry: B3PW91/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B3PW91/6-31+G**
 hartrees
Energy at 0K-228.988917
Energy at 298.15K-228.993772
Nuclear repulsion energy122.148519
The energy at 298.15K was derived from the energy at 0K and an integrated heat capacity that used the calculated vibrational frequencies.
Vibrational Frequencies calculated at B3PW91/6-31+G**
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A' 3196 3069 10.31      
2 A' 3085 2962 37.11      
3 A' 3075 2952 37.06      
4 A' 1819 1746 339.46      
5 A' 1497 1437 11.93      
6 A' 1468 1410 5.75      
7 A' 1397 1341 1.08      
8 A' 1252 1202 265.32      
9 A' 1188 1141 47.89      
10 A' 955 917 25.86      
11 A' 776 745 8.20      
12 A' 295 283 15.15      
13 A" 3161 3035 15.45      
14 A" 1487 1427 10.80      
15 A" 1174 1127 0.96      
16 A" 1036 994 0.00      
17 A" 352 337 29.76      
18 A" 119 114 0.10      

Unscaled Zero Point Vibrational Energy (zpe) 13665.6 cm-1
Scaled (by 0.9601) Zero Point Vibrational Energy (zpe) 13120.3 cm-1
See section III.C.1 List or set vibrational scaling factors to change the scale factors used here.
See section III.C.2 Calculate a vibrational scaling factor for a given set of molecules to determine the least squares best scaling factor.
Rotational Constants (cm-1) from geometry optimized at B3PW91/6-31+G**
ABC
0.67244 0.22823 0.17609

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/6-31+G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.362 0.416 0.000
O2 0.000 0.870 0.000
C3 -0.931 -0.091 0.000
O4 -0.719 -1.279 0.000
H5 1.971 1.319 0.000
H6 1.563 -0.185 0.890
H7 1.563 -0.185 -0.890
H8 -1.929 0.371 0.000

Atom - Atom Distances (Å)
  C1 O2 C3 O4 H5 H6 H7 H8
C11.43582.34852.68401.08931.09261.09263.2915
O21.43581.33772.26592.02192.08502.08501.9926
C32.34851.33771.20713.22662.64982.64981.0996
O42.68402.26591.20713.73992.68282.68282.0461
H51.08932.02193.22663.73991.79461.79464.0140
H61.09262.08502.64982.68281.79461.78093.6463
H71.09262.08502.64982.68281.79461.78093.6463
H83.29151.99261.09962.04614.01403.64633.6463

picture of methyl formate state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 O2 C3 115.683 O2 C1 H5 105.578
O2 C1 H6 110.367 O2 C1 H7 110.367
O2 C3 O4 125.768 O2 C3 H8 109.289
O4 C3 H8 124.943 H5 C1 H6 110.664
H5 C1 H7 110.664 H6 C1 H7 109.167
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.277      
2 O -0.247      
3 C 0.287      
4 O -0.438      
5 H 0.173      
6 H 0.181      
7 H 0.181      
8 H 0.140      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.028 1.698 0.000 1.985
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.181 -1.235 0.000
y -1.235 -28.843 0.000
z 0.000 0.000 -23.113
Traceless
 xyz
x 6.797 -1.235 0.000
y -1.235 -7.696 0.000
z 0.000 0.000 0.899
Polar
3z2-r21.798
x2-y29.662
xy-1.235
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 0.000 0.000 0.000
y 0.000 0.000 0.000
z 0.000 0.000 0.000


<r2> (average value of r2) Å2
<r2> 71.530
(<r2>)1/2 8.458